Step not yet complete in My Trailhead Playground 1 An unexpected error occurred while inserting Opportunity records and we couldn't check your work. Make sure Opportunity records can be inserted in this org, and click "Check Challenge" again. If this cont

Hi Gayathri, please check that Opportunities can be created in your Trailhead Playground and that there are no validation rules, required fields, or automation preventing Opportunity records from being inserted.  

You can also try creating a test Opportunity manually to confirm that the record saves successfully, then run Check Challenge

again.  

If the Opportunity can be created successfully but Trailhead still shows the same error, please share a screenshot of the error and your Opportunity setup. If the issue persists, I’d recommend creating a case with Salesforce Support for further investigation.